Soft polyester fiber and preparation method thereof
A polyester fiber and soft technology, applied in the field of soft polyester fiber and its preparation, can solve the problems of poor softness of polyester fiber, and achieve the effects of high volatilization point, excellent heat resistance stability and good softness
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Embodiment 1
[0059] A kind of preparation method of soft polyester fiber, concrete steps are as follows:
[0060] (1) Preparation of modified polyester:
[0061] (a) esterification reaction;
[0062] Prepare a slurry of terephthalic acid, ethylene glycol and adipic acid with a molar ratio of 1:1.2:0.03, add antimony trioxide, titanium dioxide and triphenyl phosphate and mix evenly, pressurize in a nitrogen atmosphere for esterification For the reaction, the pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. When the amount of water distilled out in the esterification reaction reaches 90% of the theoretical value, it is the end of the esterification reaction. The amount of antimony trioxide added 0.01% of the weight of terephthalic acid, the addition of titanium dioxide is 0.20% of the weight of terephthalic acid, and the addition of triphenyl phosphate is 0.05% of the weight of terephthalic acid;
[0063] (b) polycondensation reaction; ...
Embodiment 2
[0069] A kind of preparation method of soft polyester fiber, concrete steps are as follows:
[0070] (1) Preparation of modified polyester:
[0071] (a) esterification reaction;
[0072] Make a slurry of terephthalic acid, ethylene glycol and adipic acid with a molar ratio of 1:1.4:0.05, add antimony acetate, titanium dioxide and trimethyl phosphite and mix evenly, then carry out esterification under pressure in a nitrogen atmosphere Reaction, pressurized pressure is 0.1MPa, the temperature of esterification reaction is 252 ℃, when the amount of water distilled in the esterification reaction reaches 92% of the theoretical value, it is the end of the esterification reaction, wherein the addition of antimony acetate is p-benzene 0.03% of the weight of diformic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.01% of the weight of terephthalic acid;
[0073] (b) polycondensation reaction;
[0074] A...
Embodiment 3
[0079] A kind of preparation method of soft polyester fiber, concrete steps are as follows:
[0080] (1) Preparation of modified polyester:
[0081] (a) esterification reaction; terephthalic acid, ethylene glycol and adipic acid with a molar ratio of 1:1.4:0.05 are made into a slurry, after adding antimony acetate, titanium dioxide and trimethyl phosphite and mixing uniformly, The esterification reaction is carried out under pressure in the atmosphere, the pressurized pressure is 0.1MPa, and the temperature of the esterification reaction is 252°C. When the amount of water distilled in the esterification reaction reaches 92% of the theoretical value, it is the end point of the esterification reaction, of which acetic acid The addition of antimony is 0.03% of the weight of terephthalic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.01% of the weight of terephthalic acid;
[0082] (b) polycondensat...
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